Door for bakers&#39; ovens.



No. 7l7,2l7. Patented Dec. 30, I902..

T.KLHNHANS.

DOOR FOR BAKERS OVENS.

(Application filed June 4, 1902.)

(No Model.)

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A TTOHNE Y S.

UNITED, STATES PATENT OFFICE.

TITUS KLEINl-IANS, OF KARLSRUHE, GERMANY, ASSIGNOR' TO AUGUST G.

OLLRY, OF BROOKLYN, NEW' YORK.

oooa FOR BAKERS ovENs.

$PECIFIQATION forming part of Letters Patent No. 717,217, dated December 30, 1902.

Application filed June 4, 1902.. Serial No. 110,182. (No model.)

To aZZ whom it may concern.-

Be it known that I, TITUS KLEINHANs, a citizen of the Empire of Germany, residing in Karlsruhe, in the Empire of Germany, have invented certain new and useful Improvements in Doors for Bakers Ovens, of which the following is a specification.

This invention relates to an improved door for bakers ovens which is counterbalanced [o and guided in such a manner that it can be readily opened and closed and held tightly when in closed position; and the invention consists of a door for bakers ovens, a main door-frame having vertically-arranged ledges adjacent to its ends, said ledges being separated at their inner ends, pinions pivoted to the frame between the inner ends of the ledges, vertical guide-strips secured on said ledges, racked counterbalancing weights 2o meshing with said pinions and guided by the outer edges of said guide-strips, and a door having racked end edges in mesh withsaid pinions and also guided by the inner edges of said guide-strips.

The invention consists, further, of a latch device which is applied to the door and guidestrips, so as to hold the door tightly in closed position.

In the accompanying drawings, Figures 1 0 and 2 are respectively a front elevation of my improved door for bakers ovens in closed position and a portion of the door with parts removed. Figs. 3 and 4 are respectively a front elevation with the door in raised or open position and a portion of the door with parts removed. Fig. 5 is a horizontal section on line 5 5, Fig. 3. Figs. 6 and 7 are respec tively detail sections on lines 6 6 and 7 7, Fig. 4; and Fig. 8 is a detail view of the latch device.

turn freely on fixed pivots d of the frame A of the door. Onthe opposite sides of the pinions d are arranged counterbalancing-weights e, which are made of approximately U shape,the rear edges of said counterbalancing-weights being likewise provided with racks e that intermesh with the pinions d. The frame A of the door a is set into the brickwork of the oven and provided above and below the pinions d with raised ledges b. tached guide-strips b, that are extended over the pinions to the full height of the frame A and attached to the ledges b by means of fas toning-screws b, as shown in Figs. 1 and 2. The counterbalancing-weights e are guided by interior grooves 9 adjacent to the racks e on said guide-strips b and provided with exterior handles'or knobs e. The coun'terbalancing-weights are moved in upward or downward direction by their intermeshing racks e pinions d, and the racks c of, the door a when the door is moved from the closed into the open position, and vice versa, as shown,

respectively, in Figs. 2 and 1. On each side of the door a is arranged a stationary latch f, that is provided with a beveled face which is engaged by a lug g, having a corresponding beveled face on the side guide-strip b, so that when the door a is closed the inclined faces of the lugs g bind on the inclined faces of the latches and hold thereby the door tightly in position in the frame A, so as to prev'entthe automatic opening of the same.- When it is desired to open the door, it is first lifted slightly, so that its latches clear the lugs, when the door can be readily opened'in connection with the connterbalancing-weights. The door is held in raised position by the counterbalancing-weights, so that the articles can be put into the oven for baking, while on lowering the door until its latches are engaged by the stationary lugs on the guide-strips it is retained tightly in closed position.

The advantages of my improved door for bakersovens are that the same can be conveniently opened or closed by the arrangement of the guided counterweights on both ends of the same and that the door when in closed positionis tightly retained against accidental opening by the latch devices.

Having thus described my invention, I claim as new and desire to secure by Letters Patent To these ledges are at- 1. The combination, with a main doorframe having vertically-arranged ledges adj acent to its ends, said ledges being separated at their inner ends, of pinions pivoted to the provided with lugs having beveled faces, and 15 a counterbalanced door, having latches with beveled faces adapted to be engaged by said lugs for holding the door tightly in closed position, substantially as set forth.

In testimony that I claim the foregoing as 20 my invention I have signed my name in presence of the subscribing witnesses.

TITUS KLEINHANS.

Witnesses:

JACOB ADRIAN, DANIEL BORN, FRIEDRICH BONNER. 

